Improvement and performance analysis of a power-saving mechanism considering traffic patterns
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Improvement and performance analysis of a power‑saving mechanism considering traffic patterns Jihee Jung1 · Azizbek Marakhimov2 · Jang Hyun Baek3
© Springer Science+Business Media, LLC, part of Springer Nature 2019
Abstract Power saving is a salient issue regarding the 4G LTE network. In wireless networks, the frequent checking of the usage of the user equipment may lead to excessive power consumption, and the discontinuous reception mechanism of the LTE is implemented to avoid such excess. The DRX trade-off metrics between power saving and the delay constraint are investigated here for an improvement in the performance. In order to meet the UE QoS, this paper suggests a predictive mechanism with a delay constraint for the traffic patterns. The results for various traffic patterns show that the suggested mechanism offers beneficial power-saving effects while satisfying the UE QoS. Keywords LTE · DRX · Power saving · Quality of service
1 Introduction Recent mobile communications provide high-speed multimedia data services such as text, image, and video, along with voice services. In this paper, a consideration of the situation when the user equipment (UE) power consumption increases considerably so as to process a large long-term evolution (LTE)-generated data amount is presented, and an improved discontinuous reception (DRX) mechanism is implemented in order to optimize the power consumption. The DRX technology is included in the LTE-specific 3rd Generation Partnership Project (3GPP) Release 8 so as to reduce the UE power consumption [4]. In prior studies, DRX optimization has been proposed in various simulations and
* Jang Hyun Baek [email protected] 1
CAMTIC Advanced Mechatronics Technology Institute, Jeonju 54852, Korea
2
School of Logistics, Inha University in Tashkent, Tashkent, Uzbekistan
3
Department of Industrial and Information Systems Engineering and the RCIT, Chonbuk National University, Jeonju 54896, Korea
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experiments wherein examinations of the power-saving effect due to the scheduling delay of the DRX setting have been performed [1, 5, 7, 9]. The studies of mathematical modeling of DRX optimization have also been conducted [3, 10, 11]. However, most of those studies focused on the methods of increasing or decreasing the length of the DRX sleep mode based on the previous packet-traffic values. In addition, during the application of the DRX modes, greater attention was directed toward the power-saving effect between the power saving and the service delay. In this paper, in order to satisfy the UE quality of service (QoS), the aim of the proposed method is achieving a reduced service-delay time by predicting the length of the DRX sleep mode based on the traffic change and the delay constraints.
2 DRX mechanism The 3GPP LTE standard [4] specifies the DRX operations for the UE power saving. The DRX operation shifts between active and sleep modes depending on the amount of power consumed. When a packet arrives, the UE in the active mode always activa
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